Jan. 31, 2016, 6:19 p.m.

Marco Rubio's campaign raised $14 million in the final quarter of last year -- still less than chief rival Ted Cruz's.

The Florida senator's backers were bullish heading into Sunday's filing deadline, noting that fundraising picked up substantially last fall as donors began to coalesce around the candidate. He doubled the amount raised in the previous quarter, the campaign said.

But Rubio started 2016 with $10 million cash on hand. His money trails that of Ted Cruz, whose team has boasted of $19 million raised, thanks in part to the Texas senator's wife, Heidi, a Goldman Sachs executive on leave, who has become a fundraising dynamo.

Iowa has become a family affair for the Clintons in the final days before the caucuses.

Hillary Clinton is stumping with her husband, former President Bill Clinton, and their daughter Chelsea to rev up supporters. Not only that, Chelsea brought her baby daughter, Charlotte, with her to Iowa, although not to any campaign rallies.

“It’s an absolute thrill and delight to have my daughter with me as we criss-cross Iowa," Hillary Clinton told a crowd in Council Bluffs. "And as much as I love that, I really love the fact that she brought my granddaughter with her to Des Moines. I get to have a little time with Charlotte.”

Jan. 31, 2016, 2:36 p.m.

Donors are digging into their pockets with small-dollar contributions for Democrat Bernie Sanders, who raised $20 million in January alone, putting him on track to beat Hillary Clinton's first-quarter 2016 goal.

The Vermont senator, whose campaign shuns super PAC contributions, kept pace with Clinton late last year. His team said their fourth-quarter filing, due Sunday at the Federal Election Commission, would show $33 million raised.

But the more notable development was the former long-shot candidate's January total.

Jan. 31, 2016, 1:38 p.m.

Donald Trump and his wife, Melania, arrive Sunday at First Christian Church in Council Bluffs, Iowa. (Jae C. Hong / Associated Press)

On the eve of the Iowa caucuses, Donald Trump tried to shore up his standing among conservative Christians by attending church Sunday and bringing his wife, a rare campaign appearance for her.

Jerry Falwell Jr., president of the evangelical Liberty University in Virginia, vouched for Trump’s moral fiber at a school rally with the Republican presidential candidate in Council Bluffs on the western edge of Iowa.

Falwell recalled that Ronald Reagan was a Hollywood actor who divorced and remarried before he unseated President Carter in 1980, making an implicit comparison to Trump, who is a reality television star who has married three times.

Jan. 31, 2016, 12:18 p.m.

Democratic presidential candidates will gather twice in New Hampshire this week, including at a newly added debate, giving them opportunities to make their pitch and undercut their rivals in the race to win the state's primary Feb. 9.

Hillary Clinton, Bernie Sanders and Martin O'Malley will square off in a newly added debate on Thursday on MSNBC. As the race has tightened, front-runners Clinton and Sanders have both sought to add debates.

A night earlier, the three will participate in a forum hosted by CNN. Candidates will appear separately to take questions from voters and news anchor Anderson Cooper.

Republican presidential candidate Donald Trump told Fox News Sunday’s Chris Wallace that he thinks the Supreme Court, which last year ruled that same-sex marriage does not violate the Constitution, should have left decisions about single-sex marriage to individual states.

Trump and fellow Republican candidate Sen. Ted Cruz (R-Texas) are battling for the support of Iowa's evangelical voters as the state prepares for Monday night's first-in-the-nation caucuses.